package com.nebula.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.nebula.common.Const;

public class SessionTimeOutInterceptor implements HandlerInterceptor{
	private static final String LOGIN_URL = "/nebula/login.jsp";
	
	@Override
	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		HttpSession session = request.getSession(true);
		Object obj = session.getAttribute(Const.USERINFO);
		if(obj == null || "".equals(obj.toString())){
			response.sendRedirect(LOGIN_URL);
			return false;
		}
		return true;
	}
}
